Knight Farm Machinery’s new Vario Select control system enables users to achieve totally even spray application when working on uneven shaped field margins and around fixed in-field obstructions.
The system works by using combinations of four different capacity spray nozzles at each spray point to offer up to 16 different application rates, typically from zero to 800 lit/min.
The machine can also spot spray from a prescription map, with volumes changing according to the severity of the weed, pest or disease problem.
Vario Select offers a flexible rate control, including turn compensation, with the ability to instantly switch between nozzle types, a feature particularly suitable for liquid fertiliser users.
Vario Select includes a simple computerised nozzle selector that lets the operator dial in the target rate, required droplet size, minimum and maximum pressures and the working speed range. It then displays the available working range.
“The operator can also ask the system to recommend the best choice of nozzles for any particular job,” The company’s Brian Knight said. “Vario Select uses well-recognised technology; is fully integrated with the sprayer’s computer system; and is fully ISObus compatible”.
It uses a gyroscopic system to adjust output along the boom in curved tramlines. This ensures that – no matter how much slower the inner boom tip is going and how fast the outer tip, applications are adjusted along the boom so that the application rate remains absolutely even right across the working width.
